FAG NJ348-E-TB-M1 cylindrical roller bearing
- Brand
- FAG
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
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Decoding FAG NJ348-E-TB-M1
- NJ 3Series
- Cylindrical roller bearings, NJ 3 series. Series differ in outside diameter and width even when the bore is the same.
- 48Bore
- Bore 240 mm (48 × 5).
- E-TB-M1Suffix
- FAG suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NJ 348 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
FAG NJ348-E-TB-M1 measures 240 mm across the bore and 500 mm across the outside diameter; its width is 95 mm (240 x 500 x 95 mm).
FAG NJ348-E-TB-M1 belongs to cylindrical roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for NJ348-E-TB-M1 and any equivalents.
FAG NJ series cylindrical roller bearings are built to handle high radial loads and elevated speeds. Their cylindrical rollers and machined brass cage support precise operation in tough conditions. Typical uses include machine tools, gearboxes, pumps, compressors and other industrial equipment that demands high radial capacity and rigidity.
Reading an NJ code helps you select the right bearing. The letters NJ mean the outer ring has one fixed rib and the inner ring has one rib, so the bearing can guide the shaft axially in a single direction. The following number relates to size and corresponds to bore and outer diameter. The E suffix signals a higher load capacity. TB stands for a machined brass cage, while M1 indicates a one-piece brass cage. A code like NJ248-E-TB-M1 brings these features together for specific duties.
These bearings appear across many industries: gearboxes, machine tools, centrifugal pumps, screw compressors and conveyors. They also serve metallurgical, cement, mining and food processing operations where radial loads are heavy and rotational accuracy matters. Because they tolerate high speeds, they suit electric motors and machine spindles as well.
Selecting an NJ bearing starts with the radial and axial loads it will carry, plus the operating speed and environmental conditions. Use proper tools during mounting and avoid striking the rollers directly. Grease or oil lubrication works depending on the application, and precise alignment between shaft and housing prevents extra stress. Sealing depends on the environment; in contaminated areas, add extra protection. Always check internal clearance and fitting tolerances.
NJ series cylindrical roller bearings from different brands usually share main dimensions, but interchangeability should be verified. Load capacity, cage type and suffixes can differ between manufacturers. When replacing a bearing, compare dimensions as well as performance and internal design. For a correct equivalent, give our specialists the complete part number of the original bearing.
To request a quote for FAG NJ series bearings, send the exact part number from your equipment or nameplate via WhatsApp. We reply promptly and can suggest alternatives for your application. We also advise on mounting and lubrication to help extend bearing service life.
Dimensions
240 x 500 x 95 mm (d x D x B): boundary dimensions for basic designation NJ 348, according to ISO 15.
- Bore
- 240mm
- Outside diameter (D)
- 500mm
- Width (B)
- 95mm
SKF parts in this size
Other brands' pages with basic designation NJ 348: 240 x 500 x 95 mm (d x D x B) per ISO 15.
- Need the SKF NJ 348? We can also quote:NJ 348 MA
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- FAG NJ348-E-TB-M1 bearing: what are its dimensions?
- FAG NJ348-E-TB-M1 measures 240 mm across the bore and 500 mm across the outside diameter; its width is 95 mm (240 x 500 x 95 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NJ 348.
- What does the E suffix mean in NJ bearings?
- The E suffix indicates a higher load capacity than the standard design, achieved through more rollers or an optimized layout. Consider this when selecting for high radial loads.
- How do I choose between a brass cage and a steel cage?
- A machined brass cage (TB or M1) provides greater strength and suits high speeds and loads. The choice depends on operating conditions; for severe applications, brass is often recommended. Consult us to evaluate your case.
- Do NJ bearings allow axial loads?
- Yes, NJ bearings can support axial loads in one direction because they have a rib on the inner ring and another on the outer ring. For axial loads in both directions, combine them with other bearings or use special configurations. Always verify your application's load conditions.